1237e1ffad07
tech



Hello Jasen - 

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CA>> Now that you mention it, I do think I recall some mention
CA>> of that on RBBS message systems. Regardless CIS was the
CA>> only commercial service I knew of to offer it for dialups
CA>> and it did work, I tried it. :-) 

JB>>> in think its main fade was when 1200bps modems became
JB>>> popular. 

CA>> Quite possibly 1200 could've been 'pushed' but the
CA>> embedded code for modems changed and was not a 'brute
CA>> force polling' and used fixed rates of transfer. :-\ 

JB> yeah the 300's were basicaslly just oscillators and filters
JB> tied to serial lines 

JB> 1200s encoded two bits per symbol (period of tone) and used
JB> a fixed clock so you'd need to modify the modem to increase
JB> the clock rate 

Something like that, yes. 

>
>        ,                          ,
>      o/      Charles.Angelich      \o       ,
>       __o/
>     / >          USA, MI           < \   __\__
 

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